JPS5613140A - Blow molding method for plastic bent tube - Google Patents

Blow molding method for plastic bent tube

Info

Publication number
JPS5613140A
JPS5613140A JP8824079A JP8824079A JPS5613140A JP S5613140 A JPS5613140 A JP S5613140A JP 8824079 A JP8824079 A JP 8824079A JP 8824079 A JP8824079 A JP 8824079A JP S5613140 A JPS5613140 A JP S5613140A
Authority
JP
Japan
Prior art keywords
parison
mold
cavity
thermal conductivity
curve portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP8824079A
Other languages
Japanese (ja)
Inventor
Tetsuo Ishikawa
Tsuguo Kobayashi
Shoji Motojima
Toshiji Sakuma
Ryuichi Funada
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP8824079A priority Critical patent/JPS5613140A/en
Publication of JPS5613140A publication Critical patent/JPS5613140A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/4242—Means for deforming the parison prior to the blowing operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/48—Moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/48—Moulds
    • B29C49/4802—Moulds with means for locally compressing part(s) of the parison in the main blowing cavity
    • B29C2049/4805—Moulds with means for locally compressing part(s) of the parison in the main blowing cavity by closing the mould halves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/24—Pipe joints or couplings
    • B29L2031/243—Elbows

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

PURPOSE:To reduce a rate whereat heat is absorbed from a parison and protect against radiation of heat from the parison when a mold makes contact with the parison, whereby the roughness of the surface of a molded product is improved, by a method wherein a mold cavity corresponding to a curve portion is constituted with a mold material having a given thermal conductivity. CONSTITUTION:At a convexity, of a mold 6' corresponding to an inner angle of a curve portion, where a parison contacts light, a cavity is formed with a material fitting inside the cavity, said material having below 1.0kcalm<-1>h<-1>deg<-1> thermal conductivity, for example, a teflon resin block 12 having 0.2kcalm<-1>h<-1>deg<-1> thermal conductivity. A cooling circuit for controlling temperature is located in the teflon resin block 12. This permits the protection against the radiation resulting from contact of the cavity in a mold, corresponding to an inner angle of a curve portion, with a parison 3. And thereby a curing rate of the parison is reduced and the roughness of the surface of a molded product can be improved.
JP8824079A 1979-07-13 1979-07-13 Blow molding method for plastic bent tube Pending JPS5613140A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8824079A JPS5613140A (en) 1979-07-13 1979-07-13 Blow molding method for plastic bent tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8824079A JPS5613140A (en) 1979-07-13 1979-07-13 Blow molding method for plastic bent tube

Publications (1)

Publication Number Publication Date
JPS5613140A true JPS5613140A (en) 1981-02-09

Family

ID=13937327

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8824079A Pending JPS5613140A (en) 1979-07-13 1979-07-13 Blow molding method for plastic bent tube

Country Status (1)

Country Link
JP (1) JPS5613140A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58189416A (en) * 1982-04-27 1983-11-05 Taisei Corp Construction of joint for continuous underground wall
WO1993006980A1 (en) * 1991-10-01 1993-04-15 Asahi Kasei Kogyo Kabushiki Kaisha Metallic mold for molding synthetic resin
EP0647517A2 (en) * 1993-10-06 1995-04-12 JOHNSON &amp; JOHNSON CONSUMER PRODUCTS, INC. Molding irregular objects
CN111640564A (en) * 2020-06-11 2020-09-08 江西变电设备有限公司 Transformer bender of bending

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58189416A (en) * 1982-04-27 1983-11-05 Taisei Corp Construction of joint for continuous underground wall
JPS6328181B2 (en) * 1982-04-27 1988-06-07 Taisei Corp
WO1993006980A1 (en) * 1991-10-01 1993-04-15 Asahi Kasei Kogyo Kabushiki Kaisha Metallic mold for molding synthetic resin
EP0647517A2 (en) * 1993-10-06 1995-04-12 JOHNSON &amp; JOHNSON CONSUMER PRODUCTS, INC. Molding irregular objects
EP0647517A3 (en) * 1993-10-06 1995-08-09 Johnson & Johnson Consumer Molding irregular objects.
CN111640564A (en) * 2020-06-11 2020-09-08 江西变电设备有限公司 Transformer bender of bending

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